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diff util/snr.m @ 162:88578ec2f94a danieleb

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Updated grassmannian function and minor debugs
author Daniele Barchiesi <daniele.barchiesi@eecs.qmul.ac.uk>
date Wed, 31 Aug 2011 13:52:23 +0100
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/snr.m	Wed Aug 31 13:52:23 2011 +0100
@@ -0,0 +1,6 @@
+function x = snr(s,r)
+% SNR calculates the signal-to-noise ratio between the signal s and its
+% representation r defined as:
+% SNR = 20*log10(||s||_2/||s-r||_2)
+err = s-r;
+x = mag2db(norm(s(:))/norm(err(:)));
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